Q：Executing SQL script in server
ERROR: Error 1005: Can't create table 'aquaticstar.link' (errno: 121)
A：I searched quickly for you, and it brought me here. I quote:
You will get this message if you're trying to add a constraint with a name that's already used somewhere else
To check constraints use the following SQL query:
SELECT
constraint_name,
table_name
FROM
information_schema.table_constraints
WHERE
constraint_type = 'FOREIGN KEY'
AND table_schema = DATABASE()
ORDER BY
constraint_name;
Look for more information there, or try to see where the error occurs. Looks like a problem with a foreign key to me.
Q：ERROR: Error 1005: ...... (errno: 150)
A:查看mysql主表的键字段与从表的字段的值类型是否一样，比如varchar（10），int
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